Document Detail

Temporal properties of disparity processing revealed by dynamic random-dot stereograms.
MedLine Citation:
PMID:  16309115     Owner:  NLM     Status:  MEDLINE    
In studies of the temporal flexibility of the stereoscopic system, it has been suggested that two different processes of binocular depth perception could be responsible for the flexibility: tolerance for interocular delays and temporal integration of correlation. None has investigated the relationship between tolerance for delays and temporal integration mechanisms and none has revealed which mechanism is responsible for depth perception in dynamic random-dot stereograms. We address these questions in the present study. Across five experiments, we investigated the temporal properties of stereopsis by varying interocular correlation as a function of time in controlled ways. We presented different types of dynamic random-dot stereograms, each consisting of two pairs of alternating random-dot patterns. Our experimental results demonstrate that (i) disparities from simultaneous monocular inputs dominate those from interocular delayed inputs; (ii) stereopsis is limited by temporal properties of monocular luminance mechanisms; and (iii) depth perception in dynamic random-dot stereograms results from cross-correlation-like operation on two simultaneous monocular inputs that represent the retinal images after having been subjected to a process of monocular temporal integration of luminance.
Elena Gheorghiu; Casper J Erkelens
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Perception     Volume:  34     ISSN:  0301-0066     ISO Abbreviation:  Perception     Publication Date:  2005  
Date Detail:
Created Date:  2005-11-28     Completed Date:  2006-02-09     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0372307     Medline TA:  Perception     Country:  England    
Other Details:
Languages:  eng     Pagination:  1205-19     Citation Subset:  IM    
Helmholtz Institute, Utrecht University, The Netherlands.
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MeSH Terms
Color Perception
Depth Perception / physiology*
Discrimination (Psychology)
Middle Aged
Pattern Recognition, Visual
Photic Stimulation / methods
Sensory Thresholds
Time Factors
Vision Disparity
Vision, Binocular
Vision, Monocular

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